EP0414270A2 - Pile à combustible à À©lectrolyte solide - Google Patents

Pile à combustible à À©lectrolyte solide Download PDF

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Publication number
EP0414270A2
EP0414270A2 EP90116284A EP90116284A EP0414270A2 EP 0414270 A2 EP0414270 A2 EP 0414270A2 EP 90116284 A EP90116284 A EP 90116284A EP 90116284 A EP90116284 A EP 90116284A EP 0414270 A2 EP0414270 A2 EP 0414270A2
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EP
European Patent Office
Prior art keywords
fuel cell
film
set forth
solidous
forming
Prior art date
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EP90116284A
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German (de)
English (en)
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EP0414270B1 (fr
EP0414270A3 (en
Inventor
Kazuo Fushimi
Kaoru Kitakizaki
Kazuhiko Kawakami
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Meidensha Corp
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Priority claimed from JP1217780A external-priority patent/JP2940008B2/ja
Priority claimed from JP1217777A external-priority patent/JP2841528B2/ja
Application filed by Meidensha Corp, Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Corp
Publication of EP0414270A2 publication Critical patent/EP0414270A2/fr
Publication of EP0414270A3 publication Critical patent/EP0414270A3/en
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Publication of EP0414270B1 publication Critical patent/EP0414270B1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
    • H01M4/8896—Pressing, rolling, calendering
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8825—Methods for deposition of the catalytic active composition
    • H01M4/8867—Vapour deposition
    • H01M4/8871—Sputtering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
    • H01M4/8882—Heat treatment, e.g. drying, baking
    • H01M4/8885—Sintering or firing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1007—Fuel cells with solid electrolytes with both reactants being gaseous or vaporised
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/1213—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the electrode/electrolyte combination or the supporting material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/1231—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte with both reactants being gaseous or vaporised
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • H01M8/2425—High-temperature cells with solid electrolytes
    • H01M8/2432—Grouping of unit cells of planar configuration
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M2004/8678—Inert electrodes with catalytic activity, e.g. for fuel cells characterised by the polarity
    • H01M2004/8684—Negative electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0065—Solid electrolytes
    • H01M2300/0068—Solid electrolytes inorganic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/8605—Porous electrodes
    • H01M4/861—Porous electrodes with a gradient in the porosity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/8647—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites
    • H01M4/8657—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites layered
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/9016—Oxides, hydroxides or oxygenated metallic salts
    • H01M4/9025—Oxides specially used in fuel cell operating at high temperature, e.g. SOFC
    • H01M4/9033—Complex oxides, optionally doped, of the type M1MeO3, M1 being an alkaline earth metal or a rare earth, Me being a metal, e.g. perovskites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/9041—Metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present invention relates generally to a fuel cell utilizing solidous electrolyte. Specifically, the present invention relates to a fuel cell which is composed of stacking solidous electrolyte thin film and a process for forming same.
  • Fuel cells such as plate type fuel cells are well known cell products utilizing porous substrates.
  • fuel cells for the production of electrical energy from a fuel and oxidant are well known in the art. Simply put, such cells are composed of a plurality of cell unit structures comprising sequentially stacked porous substrate, an anode electrode film, an electrolyte layer and a cathode electrode film, the cell units are connected in series. Hydrogen gas as fuel is provided in the cathode side of the fuel cell body and air (Oxygen gas) as oxidant is provided in the anode side thereof, then hydrogen and oxygen are reacted for producing electromotive force and water as a by-product.
  • the electrolyte can be a solid, a molten paste, a free-flowing liquid, or a liquid trapped in a matrix. This invention is concerned with the solid type of electrolyte which is preferred for many applications.
  • V iRt x 10 ⁇ 4
  • R resistance (ohm ⁇ cm)
  • t thickness of solidous electrolyte ( ⁇ m)
  • Porous substrates generally in use have dispersed void sizes in a range of 0.5 to 40 ⁇ m. Numbers of pin holes are formed in both the electrode film and the solidous electrolyte where it is stacked on portions of the substrate having relatively large void sizes, when the thin electrode film with the solidous electrolyte are stacked on the substrate.
  • electromotive force is produced at both sides of the solidous electrolyte when a concentration difference is created by a partial pressure difference of oxygen at each side. That is, the partial pressure difference forms a kind of concentration cell.
  • electromotive force E0 proportionally increases corresponding to the ratio of the oxygen partial pressure. Therefore, any pin holes formed in the solidous electrolyte reduces the partial pressure difference of oxygen to zero, it causes loss of electromotive force or may even make the production thereof impossible. Avoid the formation of pin holes is greatly important for forming fuel cells.
  • a fuel cell constructed of a plurality of cell unit structures stacked and connected in series, wherein the cell unit structure is composed of, a porous substrate, a hydrogen electrode film stacked on the porous substrate, the hydrogen electrode formed of fine particles of nickel powder having fine voids of homogeneous diameter, a solidous electrolyte film stacked on the hydrogen electrode film, and an oxygen electrode film stacked on the solidous electrolyte film.
  • a process for forming the above-mentioned fuel cell wherein the cell unit structure is formed by a process comprising the steps of: preparing a porous substrate for a base of the cell unit structure, stacking a hydrogen electrode thin film having fine voids of homogeneous diameter on the porous substrate, wherein the film is formed by pressing a mixture of fine particles of nickel powder then sintering the mixture, stacking a solidous electrolyte film on the hydrogen electrode film, and stacking an oxygen electrode film on the solidous electrolyte film.
  • a fuel cell body 10 is composed of a plurality of cell unit structures S, a pair of fixing plates 11a and 11b to connect the stacked cell units S in series, a hydrogen path 12 for providing hydrogen to a cathode plate side of each cell unit S, an oxygen path 13 for providing oxygen to an anode plate side of each cell unit S, and a pair of lead lines 14 and 15 to collect electric power from the cathode and the anode sides of each cell unit S.
  • Both paths 12 and 13 which provide gas are installed on the outside of the cell body 10, and lead lines 14 and 15 are installed on the outside or each cell unit S.
  • Electric power and water are produced when hydrogen gas and air (oxygen gas), provided respectively, react through an electrolyte, then electric power produced is collected by the lead lines 14 and 15.
  • Fig. 2 is an enlarged longitudinal sectional view of stacked fuel cell bodies as shown in Fig. 1 which utilize a type of solidous electrolyte.
  • a cell unit is composed of a lamination of a porous substrate 21 formed of stainless steel, a hydrogen electrode film (a first electrode film) 22, a solidous electrolyte film 23, and an oxygen electrode film (a second electrode film) 24, which are laminated sequentially.
  • the hydrogen electrode film 22 is formed on the porous substrate 21 as in the following example;
  • SUS316L JIS standard having about 40% of void ratio, 0.5 ⁇ m of nominated void size and about 1 mm of thickness was used.
  • the nominated void size is indicated as 0.5 ⁇ m, the actual void sizes are dispersed in a certain range, there are many voids having about 10 ⁇ m, sometimes up to about 40 ⁇ m.
  • the porous substrate 21 was punched to a disc having 0.5 inch of diameter, then the disc was subjected to ultrasonic cleaning in a trichlene solution followed by drying.
  • the obtained substrate is shown in Fig. 3 diagramatically.
  • nickel powder having a particle diameter of less than or equal to 1 ⁇ m (hereinafter, submicron diameter) and nickel powder having particle diameter of 3 ⁇ m were mixed at a volume ratio of 1 : 1, and dissolved in water.
  • the solution of the nickel powder mixture was applied uniformly on the porous substrate 21 as shown in Fig. 4.
  • the applied solution was dried at ambient temperature, then sintered at 1000 °C for 1 hour in a hydrogen atmosphere. Thus, a first nickel film 41 was formed.
  • the surface of the first nickel film 41 was polished as shown in Fig. 5, to remove projections therefrom.
  • a #600 grit paper was used as an agent for the polishing.
  • the polished nickel film 41 was subjected to ultrasonic cleaning in deionized water and trichloroethylene solution for 10 min, the cleaned film was thereafter dried at ambient temperature.
  • about 50 mg of nickel powder having a particle diameter of 3 ⁇ m was applied uniformly to the surface of the first nickel film 41 of the porous substrate 21, a pressure of about 700 kg/cm2G was applied to the film, and the newly obtained film was sintered at 750 °C for 1 hour in a hydrogen atmosphere.
  • a second nickel film 61 was formed as shown in Fig. 6.
  • Nickel powder having submicron diameter was rubbed into the surface of the second nickel film 61, and pressure of about 700 kg/cm2G was applied to the film, nickel powder having submicron diameter was again rubbed into the surface of the pressed film, and the obtained film was again sintered at 750 °C for 1 hour in a hydrogen atmosphere.
  • a third nickel film 71 was formed as shown in Fig. 7.
  • platinum (Pt) was laminated on the surface of the third film 71 to be about 200 ⁇ m thickness using sputtering technique. Sputtering was performed using a high frequency sputtering system targeting Pt under 5 x 10 ⁇ 2 mmHg of pressure for 1 hour in an argon (Ar) gas atmosphere.
  • the preferred porous substrate it may also be formed of nickel or copper.
  • the porous substrate formed of nickel is formed by sintering the nickel powder, the void size of the obtained substrate becomes dispersed in a range of 3 to 50 ⁇ m as irregular surface which is formed according to configuration of nickel powder.
  • nickel powder has high adherence to the nickel powder electrode film, it has higher water resistance than a substrate formed of stainless steel.
  • the porous substrate can also be formed of copper powder. As the configuration of copper powder is round, configuration of the voids can be rounded and the void size thereof becomes 3 to 40 ⁇ m which is similar to nickel powder.
  • the porous substrate using the copper powder becomes an insulator when contacted with oxygen, therefore it cannot be used as the oxygen electrode but is most preferably used as a hydrogen electrode.
  • the solidous electrolyte 23 in Fig. 2 is formed as in the following examples;
  • a 10 ⁇ m thickness solidous electrolyte film was formed on the Pt coated hydrogen electrode film 22 which was laminated on the porous substrate 21.
  • An electron beam sputtering technique was applied to the forming, using a turbo-pump in a vacuum at 10 ⁇ 8 mmHg.
  • the temperature of the substrate was varied in a range of ambient to 580 °C, sputtering speed was controlled by a controller.
  • the material of the solidous electrolyte single LaF3 crystals were used, the solidous electrolyte film was formed under conditions of 500 °C of substrate temperature, 20 ⁇ /sec of sputtering speed and -3.0 kV of accelerating voltage. Thus, a solidous electrolyte film having no pin holes was obtained.
  • a magnetron sputtering technique was applied to the forming, at a 400 °C substrate temperature under a pressure of 5.3 x 10 ⁇ 3 mmHg in an Ar atmosphere. Sputtering was performed over 40 hours using a target of LaF3 powder. A 10 ⁇ m film thickness was obtained. It was concluded from the results of X-ray diffraction tests, that the obtained film was formed an LaF3 polycrystal having poor crystaline quality.
  • solidous electrolyte material it is preferrable to use following compounds La 0.95 Sr 0.05 F 2.95 , La 0.95 Sr 0.10 F 2.90 , La 0.95 Ba 0.05 F 2.29 , or La 0.90 Ba 0.10 F 2.29 .
  • composition of solidous electrolyte films obtained by sputtering techniques are similar to the composition of the original materials before sputtering even if materials having complex composition are used. Therefore, the sputtering method is preferred to thinner lamination qualities of materials having complex compositions such as La 0.95 Sr 0.05 F 2.95 .
  • a metal organic chemical vapor deposition (MOCVD) technique was applied to forming the film of solidous electrolyte.
  • Metal organic compounds including La and F in its molecule were heat-decomposed, then the obtained film of LaF3 was laminated on the Pt coated surface of the third nickel film 71 formed on the porous substrate 21 as shown in Fig. 6.
  • the structural formula of the compound is following; CF3-CF2-CF2- -CH2- -CH2-(CH3)2 La
  • the film forming was accomplished under the following conditions, i.e., the temperature of the substrate was determined at 600°C, the temperature of the metal organic compounds was maintained at 230 °C, with argon gas (Ar) as a carrier gas at flow rate of 100 ml/min. Steam of the metal organic compounds in a reactor was moved to the surface of the porous substrate 21 to react with it, thus a film of LaF3 was obtained.
  • argon gas Ar
  • a high frequency sputtering technique was applied to forming the film of solidous electrolyte, using a high frequency sputtering system at the temperature of the substrate of 800 °C, under the pressure of Ar at 5.3 x 10 ⁇ 3 mmHg.
  • zirconia stabilized by addition of yttria was used for a target. The sputtering was performed over 40 hours, and a 10 ⁇ m thickness of film of solidous electrolyte having no pin holes was obtained thereafter.
  • Compounds such as cerium oxide may also be used.
  • the oxygen electrode film 24 is formed as in the following examples.
  • the oxygen electrode film was formed of perovskite compound.
  • a perovskite compound of La 0.6 Sr 0.4 CoO x was obtained by mixing powder of cobalt acetate (CH3COO)2CO 4H2O, lanthanum acetate (CH3COO)2La and strontium acetate (CH3COO)2Sr, which amounts thereof were weighed corresponding to a composition ratio of La 0.6 Sr 0.4 CoO x .
  • the mixture of powder as above described was baked at 1000 °C for 5 hours in an oxygen atmosphere.
  • the electric resistance ratio of the obtained perovskite compound was 4.4 ohm ⁇ cm.
  • the perovskite compound was dissolved in propylene glycol, then this solution was applied to the surface of the solidous electrolyte film 23, baked under pressure at 300 °C for 8 hours in an oxygen atmosphere over 8 hours.
  • an oxygen electrode film 24 as shown in Fig. 2 was obtained.
  • a perovskite compound was formed as shown in Example 7.
  • the obtained compound was mixed with platinum black at a ratio of 3:1, then dissolved in propylene glycol.
  • the mixture was applied to the surface of the solidous electrolyte film 23, then baked under the same conditions described in Example 7, thus an oxygen electrode film 24 was obtained.
  • a perovskite compound was formed as shown in Example 7.
  • the obtained compound was then sputtered on the surface of the solidous electrolyte film 23 using a high frequency sputtering system.
  • the sputtering was accomplished in an Ar atmosphere under a pressure of 1 x 10 ⁇ 2 mmHg, at 0.5 ⁇ m/hour sputtering speed for 2 hours, thus about a 1 ⁇ m thickness of oxygen electrode film 24 was obtained.
  • the perovskite compound as above mentioned has similar characteristics to platinum but is greatly less expensive.
  • the porous substrate, the hydrogen electrode film, the solidous electrolyte film, and the oxygen electrode film formed as previously described are stacked sequentially to form a cell unit structure.
  • the cell unit is installed in a cell casing 25 having conductivity to electrically connect the hydrogen electrode film 22 of the cell unit with the casing 25.
  • the oxygen electrode film 24 is connected electrically with a separator 27 which is adhered to the cathode side.
  • a insulator 26 is installed between the cell casing 25 and the separator 27.
  • a conductive separator 27′ is connected electrically with the cell casing 25 concurrently with the oxygen electrode film 24′ at both sides of the separator 27′.
  • a insulator 26′ is installed between the separator 27′ and the casing 25′, thus a fuel cell body 40b is constructed and stacked with the cell body 40a.
  • fuel cell bodies 40c, 40d...(not shown in Fig. 2) are constructed and stacked sequentially. Therefore, a plurality of the cell units can be stacked connected in series. Oxygen, as an oxidant, is provided from gas inducing paths 29 and 29′ to the cells, and hydrogen as fuel is provided from gas inducing paths 30 and 30′ to the cells, thus, electric power is produced.
  • the hydrogen electrode is formed of fine powder mixture of nickel then sintered, void sizes can be homogenized.
  • formation of pin holes on the films laminated on the electrode can be avoided even if a very thin solidous electrolyte film is laminated. Accordingly, voltage dropping can be reduced by reducing the thickness of the solidous electrolyte.

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EP90116284A 1989-08-24 1990-08-24 Pile à combustible à électrolyte solide Expired - Lifetime EP0414270B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP1217780A JP2940008B2 (ja) 1989-08-24 1989-08-24 固体電解質型燃料電池
JP1217777A JP2841528B2 (ja) 1989-08-24 1989-08-24 固体電解質型燃料電池
JP217777/89 1989-08-24
JP217780/89 1989-08-24

Publications (3)

Publication Number Publication Date
EP0414270A2 true EP0414270A2 (fr) 1991-02-27
EP0414270A3 EP0414270A3 (en) 1991-11-13
EP0414270B1 EP0414270B1 (fr) 1995-02-15

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EP90116284A Expired - Lifetime EP0414270B1 (fr) 1989-08-24 1990-08-24 Pile à combustible à électrolyte solide

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US (1) US5151334A (fr)
EP (1) EP0414270B1 (fr)
KR (1) KR950001256B1 (fr)
DE (1) DE69016881T2 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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EP0608081A1 (fr) * 1993-01-15 1994-07-27 General Electric Company Articles revêtus et procédé pour éviter les dépôts de carburant formés par décomposition thermique
EP0607651A1 (fr) * 1993-01-15 1994-07-27 General Electric Company Prévention des dépôts de carburant formés par décomposition thermique
EP0635896A1 (fr) * 1993-07-20 1995-01-25 Sulzer Innotec Ag Pile à combustible à symétrie axiale
WO1997023007A3 (fr) * 1995-12-20 1997-07-31 Forschungszentrum Juelich Gmbh Substrat electrode pour pile a combustible
WO1997030485A1 (fr) * 1996-02-12 1997-08-21 Siemens Aktiengesellschaft Cellule electrochimique haute temperature et empilement de cellules electrochimiques a structures conductrices composites metalliques
WO1997034333A1 (fr) * 1996-03-11 1997-09-18 Forschungszentrum Jülich GmbH Revetement d'electrodes poreuses avec de minces couches electrolytiques
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EP1122806A1 (fr) * 2000-02-02 2001-08-08 Haldor Topsoe A/S Pile à combustible à oxydes solides
WO2005045963A3 (fr) * 2003-11-05 2006-07-06 Honda Motor Co Ltd Ensemble electrolyte-electrode assemble et son procede de production
WO2006018568A3 (fr) * 2004-07-21 2007-04-05 Saint Gobain Systeme electrochimique a electrolyte non oxyde
EP1225648A3 (fr) * 2001-01-17 2007-09-05 Nissan Motor Co., Ltd. Cellule à combustible à oxyde solide
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Cited By (19)

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Publication number Priority date Publication date Assignee Title
EP0466418A1 (fr) * 1990-07-07 1992-01-15 Ngk Insulators, Ltd. Pile à combustible à oxyde solide et électrode poreux pour utilisation dans celle-ci
US5805973A (en) * 1991-03-25 1998-09-08 General Electric Company Coated articles and method for the prevention of fuel thermal degradation deposits
EP0608081A1 (fr) * 1993-01-15 1994-07-27 General Electric Company Articles revêtus et procédé pour éviter les dépôts de carburant formés par décomposition thermique
EP0607651A1 (fr) * 1993-01-15 1994-07-27 General Electric Company Prévention des dépôts de carburant formés par décomposition thermique
US5418079A (en) * 1993-07-20 1995-05-23 Sulzer Innotec Ag Axially symmetric fuel cell battery
EP0635896A1 (fr) * 1993-07-20 1995-01-25 Sulzer Innotec Ag Pile à combustible à symétrie axiale
WO1997023007A3 (fr) * 1995-12-20 1997-07-31 Forschungszentrum Juelich Gmbh Substrat electrode pour pile a combustible
WO1997030485A1 (fr) * 1996-02-12 1997-08-21 Siemens Aktiengesellschaft Cellule electrochimique haute temperature et empilement de cellules electrochimiques a structures conductrices composites metalliques
AU718046B2 (en) * 1996-02-12 2000-04-06 Siemens Aktiengesellschaft High-temperature fuel cell and high-temperature fuel cell stack
US6156448A (en) * 1996-02-12 2000-12-05 Siemens Aktiengesellschaft High temperature fuel cell and high temperature fuel cell stack
WO1997034333A1 (fr) * 1996-03-11 1997-09-18 Forschungszentrum Jülich GmbH Revetement d'electrodes poreuses avec de minces couches electrolytiques
EP1122806A1 (fr) * 2000-02-02 2001-08-08 Haldor Topsoe A/S Pile à combustible à oxydes solides
US6783880B2 (en) 2000-02-02 2004-08-31 Haldor Topsoe A/S Porous planar electrode support in a solid oxide fuel cell
EP1225648A3 (fr) * 2001-01-17 2007-09-05 Nissan Motor Co., Ltd. Cellule à combustible à oxyde solide
US7326484B2 (en) 2001-01-17 2008-02-05 Nissan Motor Co., Ltd. Solid oxide fuel cell
US7449214B2 (en) 2002-03-27 2008-11-11 Haldor Topsoe A/S Process for the preparation of solid oxide fuel cell
WO2005045963A3 (fr) * 2003-11-05 2006-07-06 Honda Motor Co Ltd Ensemble electrolyte-electrode assemble et son procede de production
US7300718B2 (en) 2003-11-05 2007-11-27 Honda Motor Co., Ltd. Electrolyte-electrode joined assembly and method for producing the same
WO2006018568A3 (fr) * 2004-07-21 2007-04-05 Saint Gobain Systeme electrochimique a electrolyte non oxyde

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KR910005504A (ko) 1991-03-30
DE69016881T2 (de) 1995-06-08
US5151334A (en) 1992-09-29
DE69016881D1 (de) 1995-03-23
EP0414270A3 (en) 1991-11-13
KR950001256B1 (ko) 1995-02-15

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